Cutting-tool for lathes.



No. 727,440. PATENTED MA'Y 5, 1903. E. H. & R. G. RABIGER.

CUTTING TOOL FOR LATHES. APPLIUATION FILED MAY 21, 1902.

N0 MODEL.

'UNTTE STATES Patented May 5, 1903.

PATENT OFFICE.

EMIL H. RABIGER. AND ROBERT G. RABIGER, OF PHILADELPHIA, PENNSYLVANIA;

CUTTING-TOOL FOR LATHES.

SPECIFICATION forming part of Letters Patent No. 727,440, dated May 5,1903.

Application filed May 21, 1902.

To all whom, it ntay concern.-

Be it known that we, EMIL H. RABIGER and ROBERT G. RABIGER, citizens ofthe United States, and residents of Philadelphia, Pennsylvania, haveinvented certain Improve.

ments in Cutting-Tools, of which the followin g is a specification.

The object of our invention is to so construct a cutting-tool for ametal-turning lathe as to facilitate the turning of concave portions ofthe work, such as rounded grooves or fillets in angles. This object weattain in the manner hereinafter set forth, reference being had to theaccompanying drawings,in which- Figure 1 is a side view, partly insection, of sufficient of a lathe turning-tool to illustrate ourinvention. Fig. 2 is a top or plan view of the same; and Fig. 3 is asect-ion on the line a, a, Fig. 2.

1 represents a part of the shank of a lathe turning-tool intended to beclamped in the tool rest or carriage of the lathe in the ordinarymanner, this shank terminating in a gooseneck 2, the outer dependingmember of which constitutes a bearing for a vertical shaft 3, said shafthaving at the lower end a collar 4, which bears against the lower end ofthe outer member of the gooseneck and serves as a seat for thecutting-tool 5, the latter being perforated for the passage of the shaft3 and being held in contact with the collar 4 by means of a nut6,applied to the threaded lower end of said shaft 3.

The cutting-tool 5 is locked to the shaft 3 and its collar 4 by means ofa pin 7, projecting from the collar and entering an opening in thecutting-tool, or the said cutting-tool may be otherwise prevented fromturning independently of the shaft-as, for instance, by imparting tothat portion of the latter which passes through the cutting-tool asquare or other polygonal shape.

The upper end of the shaft 3 has keyed or otherwise positively securedto it a wormwheel 8, held in place vertically by a nut 9 and lock-nut10, and said worm-wheel meshes with a worm 11 on a shaft 12, which hasits bearing in an eccentric sleeve 13, mounted in a lug or projection 14on the top of the gooseneck 2, said eccentric sleeve having a projectingarm 15, which plays in a slot 16 of the Serial No. 108,368. (No model.)

projection 14, whereby when the sleeve is in one extreme position ofadjustment, as shown in Figs. 2 and 3, the worm 11 will mesh with theworm-wheel 8, so that movement can be imparted to the latter by turninga disk 17, which is secured to the shaft 12. When, however, theeccentric sleeve 13 is in its other extreme position of adjustment, theworm will be moved out of mesh with the worm-wheel 8, and the shaft 3can be turned independently of the shaft 12as, for instance, by means ofa wrench or other implement applied to the squared and projecting upperend 18 of the shaft 3. This latter plan may be resorted to when quickmovement of the cutting-tool is desired.

The shaft 12 projects beyond the disk 17 and is squared or otherwiseshaped, as shown at 19, for the reception of a wrench or otherimplement, whereby the shaft may be turned when a slow but extremelypowerful movement of the cutting-tool 5 is required. Ordinarily,however, the work to be done will not require any greater amount ofpower than can be conveniently exerted by turning the disk 17 by hand,the periphery of said disk being, by preference, knurled or roughened,as shown at 20 in Fig. 1, so as to permit of a good hold upon the same.

The cutting-tool 5 can be readily removed and another tool of differentlength substituted for it, depending upon the radius of curve of the cutto be made. Hence our invention very materially facilitates the class ofwork for which it is intended-that is to say, the cutting of grooves,fillets, or other concave portions of the work.

In some cases the use of the worm-gearing as a means of impartingmovement to the shaft 3 may be dispensed with, and the latter may bedirectly operated by means of a wrench or lever, or some other form ofgearing may be substituted for the worm-gearing; but the use of thelatter is in most cases to be preferred.

Having thus described our invention, we claim and desire to secure byLetters Patent 1. The combination of the shank of a lathetool having agooseneck thereon, a cuttingtool removably carried by the outer memberof said gooseneck, and mechanism carried at the top of the gooseneck formoving the tool independently of the said shank, substantially asdescribed.

2. The combination of the shank of a lathetool having a gooseneckthereon, a shaft extending longitudinally through the outer member ofsaid gooseneck, a cutting-tool carried by the end of the shaft farthestfrom the bend of the gooseneck and mechanism on the bend of thegooseneck operatively connected with said shaft for turning the same andwith it the tool, substantially as described.

3. The combination of the shank of a lathetool with a gooseneck thereon,a shaft extending longitudinally through the outer member of thegooseneck, a cutting-tool on what is normally the lower end of saidshaft, a second shaft carried at the top of the gooseneck and normallylying in a plane at right angles to the line of the first shaft, andmechanism operatively connecting said two shafts, said second shaftlying at an angle to the line of the lathe-tool, substantially asdescribed.

4. The combination of the shank pf a lathetool having a gooseneck at oneend, a shaft extending longitudinally through the outer member of saidgooseneck, a cutting-tool removably fixed to the end of said shaftfarthest from the bend of said gooseneck, a gear.- wheel fixed to theopposite end of said shaft, a bearin g carried on the top of thegooseneck,

a second shaft also carried thereon in a plane at right angles to theline of the first shaft and at an angle to the line of the lathe-tool,means carried by said second shaft for operatively connecting it withthe gear on the first shaft, and means for connecting or disconnectingthe second shaft and the first shaft at will, substantially asdescribed.

5. The combination of the shank of a lathetool having a gooseneck, ashaft carried in a bearing formed longitudinally through the outermember of said gooseneck, mechanism for revolving said shaft at willindependently of the gooseneck, a collar carried by the end of the shaftfarthest removed from the bend of the gooseneck, a projection on saidcollar extending parallel to the length of said shaft, and acutting-tool having a portion constructed to extend around said shaftand engaging said projection, and means for removably holding said toolin position, substan tially as described.

In testimony whereof we have signed our names to this specification inthe presence of two subscribing witnesses.

EMIL H. RABIGER. ROBERT Gr. RABIGER.

\Vitnesses:

MURRAY 0. BOYER, J 0s. H. KLEIN.

